RT Series Wirewound Rheostats - 12 W and 500 W
The Vishay RT Series of linear wire wound rheostats are designed for use in professional and industrial equipment. Particularly in equipment where transients, repeated overloads, impacts and vibrations characterise everyday operation.Suggested accessories for these rheostats include control buttons and displays.
Features & Benefits
Vitreous enamel construction provides exceptional reliability
Linear wire wound track
Compact size per dissipation rating
Wide operating temperature range
Designed for heavy-duty applications such as repeated overloads, transients and conditions where shock and vibrations occur
Rheostats supplied with mounting hardware
1000 Vrms dielectric strength for 25 W models
±10% tolerance
Dimensions
P
withstand
(mm)
type
at 25°C
voltage
A
B
C
D
E
F
RT12
12 W
1000 V
22.5
70°
18
22
13
3
RT25
25 W
1000 V
38
60°
28
22
12
6
RT55
55 W
1000 V
60
60°
39
25
15
6
RT100
100 W
1500 V
85
60°
56
25
18
6
RT230
230 W
2000 V
143
60°
75
50
10
RT500
500 W
3500 V
143
60°
108
50
10
Linear variation principle
Rotation angle:
300°± 5°
(290° ±15° for RT 12)
Tolerance:
±10%
Insulation resistance:
1 GΩ
Accessories
- buttons: 60JF (RT230, RT500); 41JF (RT55, RT100); 29JF (RT25)
- dials: CG115, CG115/4T (RT230, RT500); CG57 (RT25); CG78 (RT55, RT100)
Operating temperature range
–55 °C +320 °C
Climatic category:
55/220/56 for RT25L and RT100L
55/200/56 for RT55L, RT230L, RT500L and RT12
Power
Face Dia. (A)
Overall Length (C + D)
Shaft Dia. (F)
Shaft Length (E)
Mtg. Bush Dia.
Mtg. Bush Length
Weight
25W
38
50
6
12*
10
9
80g
55W
60
64
6
15*
10
9
175g
100W
85
81
6
18*
10
9
400g
250W
143
125
10
50
-
-
1300g
500W
143
158
10
50
-
-
1900g
* Shaft length excludes mounting bush.
Resistance Tolerance
±10%
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